Cos;
I'm not sure if Pacific is old enough to qualify. I know courses used to have to wait something like five years for the GD list, but in 2001 they included Bandon Dunes (opened in 1999) at number 41, so obviously that's changed. I'm not sure what the new requirement is, though.
As far as "resistance to scoring", I found it funny that despite almost 700 yards in difference from the tips, as well as the somewhat dubious 150 slope rating of BD from there, most of the people I spoke with at our outing last week (including low handicappers) found PD to be tougher, and more "resistant" to medal scoring.